Machine for roughing shoe parts



4Milly 28, 1935 c. G. Bos'rRoM 2,002,522

MACHINE FOR ROUGHING SHOE PARTS Filed oct. 2o. 1951d s Smets-sheet 1 f/ MMM May 28,1935.l G, BROSTRO'M 2,002,522

MACHINE FOR ROUGHING SHOE PARTNS Filed 00'0. 20, 1931 3 Sheets-Sheet 2 /M/gA/TU@ @Wgmmm May 28, 1935. c. Gv BRosTRoM 2,002,522

MACHINE FOB ROUG'HING SHOE PARTS i Filed Oct. 20, 1931 3 Sheets-Sheet I5 Patented May 2 8, 1935 y UNITED STATES PATENT OFFICE ivnicirnvlrY 'non RoUGHfING suon raars Charles G. Brosktrom, Lynn, Mass., assignor to United Shoe Machinery Corporation, Paterson, Nrj., a corporation of New Jersey Appiication october zo, 1931, serial No. 569,938

"6 claims. (o1. 51-57) This invention relates to ,machinesv for and` methods of roughing `'or `abrading parts of boots and shoes or the like, 'and "particularly to `machinesI for removing the finished surface of. r` leather pieces preparatory to attaching them the bond between the cement and these leather l5 parts of the shoe is improvedand made more secure if the finished surface of the leather is removed or roughened preparatory to the application of cement. In one aspect, accordingly, my invention consists in a machine adapted for roughing themarginal portionof the inturnevd upper of `a lasted shoe `and it includes Within its scope a novel method of performing this ,operation.

It is di'l'icult to `gauge accurately a roughing operation upon the bottom of alasted shoe from the peripheral edge thereof, particularly on account of the curvature rof the last in the shank of the shoe. AIf have discovered that the roughing operation may be satisfactorily gauged from the inner edge of the over-wiped upper material upon the shoe bottom. An important feature of my invention, therefore, consists in a roughing machine having a gauge adapted to run uponlthe insole `of anrinverted shoe in Ycontact `'with the inneredge of the inturned upper material, in combination with a vibratory roughing tool movable in a path parallelto the eiective face of the gauge and in predeterminedrelation thereto. Suche constructionpermits the operator to present the bottom of a lasted shoe accuratelyA to the operation of the roughing tool and advance the t same in a controlled pathV bringingall areas of `the shoe bottom, which are to `be roughened,` progressively into the range of the vroughingV tool.

The construction above Idiscussedis not 'well' adapted for handling an outsole or other `fiat piecel and, accordingly, alternative vvork supporting and gauging mechanism is provided for adapting the machine for such afield of use.

Such mechanismr preferably includes a flat Work table and relatededge gauge which are constructed and arranged to 4be substitutedras a uni-t for the shoe bottom Agnige mechanism.

`O'ther features ofthe invention relatemore particularly to the construction of a novel roughing tool which hasv been found particularlyefcient in its abrading action and convenient in use. I prefer to employ an `abrasive band or strip and to support the operative portionV thereof upon a curved `yielchng backing'. For this purpose, a roll is preferably utilizedand inaddition to the function of shaping and supporting the abrasive band, it may be utilized also as' one element of feeding mechanism for advancing the 1'0" band when it is desired to renew the operative portion thereof. The rou'ghing tool ofmy invention includes also novel means for shaping the abrasive band into the form of a loop and guiding it about the supportingiroll. By giving the lof;

abrasive bandV a loop-shaped form, it .may bev conveniently and securely held in position upon the supporting roll and it` may also` be fed withy rapidity and accuracy When this is desired. Ac-

cordingly, another important feature of my in- 20" vention consists in a vibratoryV roughing tool" including in its structuremeans for shaping .and for feeding anabrasive band. l i, n A. t is important to reduce the time required for feeding the band in renewing the same as 'the 25 time thus consumed reducesthe outputof the machine. An important saving in this respect may be effected by arranging the bandA feeding mechanism to operate Without the necessity of stopping the vibration of the ab'rading tool.y 30` With these conditions in View, another feature of the present invention consists in thecoinbination-With avibratory roughing tool embodying an abrasive band `vvith mechanically .operated feeding mechanism controlled by ltlfieoperator and arranged-t0 act during the movement of the tool.

These and other features of the invention will be best understood and appreciated from the following descriptionof a preferred embodiment 40 thereof, selected for purposes of illustration and shown in the accompanying drawings, in which: Fig. 1 is a view of `the machine head in side elevation; t j

Fig. 2 is a sectional view of the ratchet mech- 45 anism onthe line 2`2 of Fig. 1; I Figs` is a view of the machine head' infront elevation;

Fig. 4; is adetailview, partly section .on 504 ,Figo is a view in `perspective of a-'sole il- 55 nal pin 24.

lustrating the character of the work done by the machine;

Fig. 7 is a sectional view of the machine head on an enlarged scale, on the line 'l-l of Fig. 3, showing an alternative form of gauge; and

Fig, 8 is a sectional view on the line 8 8 of Fig. 7, on an enlarged scale illustrating the mounting of the rocker or carrier member.

The machine of my invention, with appropriate adaptation, maisr be utilized for roughing or for buing various parts of boots and shoes at different stages in the manufacture thereof. VBy way of illustration, the machine as shown in Figs. l and 2 is provided with a work table and thus adapted for roughing lsoles or other hat shoe parts. In Fig. 7 it is shown as provided with a gauge for cooperating with the inner sole of a lasted shoe and thus adapted `for roughing the inturned upper material preparatory to coating it with cement. It will be apparent that the machine may be equipped with other appropriate work supports or gauges adapting it to operate upon otherv shoe parts as may be desired. The machine head is supported upon a column l!! at a convenient height for the operator and comprises a casting provided with bearings for a main shaft M which is provided with an` intermediate driving pulley l and, at one end, with an eccentric portion arranged to oscillate a horizontally disposed link i8. The forward end of the link I8 is connected to a vertically disposed rocker member Vcomprising an upper arm 2B and a lower arm 2i. The rocker member is mounted, as best shown in Fig. 8, upon a transverse journalled pin 22. The lower arm 2l of the rocker member is yoke-shaped and receives a spring bracket arm 28 which carries at its free end a hardened member 26 provided inkits upper face with a semi-cylindrical bearing surface adapted to receive and support the jour- The rocker member, on the other handyis provided with a iiber block 22 having formed in its lower surface a corresponding cylindrical bearing surface also fitting the journal pin. The spring bracket arm 28 bears against the flange of the head casting I2 at its outer end and is adjustablv maintained in place by a clamping bolt 2li.

The lower arm 2l of the rocker member is provided at. each side with shoulders 32 which have upwardly convex cam surfaces and these are arranged to bear against the lower plane faces of fiber blocks 3U secured to the head casting I2. The, engagement kof the shoulders 32 with the fiber blocks 32 positively determines the position of the rocker member Eil- 2l and the degree ofV pressure of these shoulders upon the fiber block is determined by the spring of the bracket arm .28 as adjusted by the bolt 29. The curvature of the cam surfaces is such as to depress the rocker member bodily as it swings in either direction from its central position an amount sufficient to maintain its lower end travelling in a straight line path. Suitable passages are provided in the upstandingrarm 20 of the rocker member for lubricating the bearing member 24. The construction above described is one which is particularly satisfactory for high speed oscillation or vibration of relatively short amplitude, and while it is desirable and contributes to the efficiency and smooth running of the machine, it is not, in its specic form, an essential feature of my invention.

In the machine herein illustrated, the rocker member 2li-2l carries and forms apart of the abrading or roughing tool. 4Tothis end a carrier member 34 having upwardly extending arms 32 and 38 is securely bolted to the lower arm 2l of the rocker member by clamping bolts 39 as best shown in Fig. '7. The carrier member 34 is provided with elongated bearings for a horizontal ratchet shaft lill provided at its rear end with a ratchet disk l2 and a toothed flange L36, the latter cooperating with a pair of spring actuated detents All suitably mounted in sockets in the carrier member 34. The detents lill and toothed flange l5 serve to hold the ratchet shaft normally at rest, although the detents yield to permit it to be rotated at times by the ratchet disk 42, as will presently appear.

At its forward side'the carrier member is provided with a thick cover casting d8 flanged at its edges and attached to the face of the carrier member by screws 5i). The cover casting 48 closes a chamber which is formed in the forward face of the carrier member 34 and in which is provided a pinion 52 pinned to the ratchet shaft 4B and rotatable therewith. The cover casting 48 is also provided with a, bore for the reception of the forward end of the ratchet shaft 4i? which, as will be noted, is provided with a square section lll to flt a socket wrench whereby the ratchet shaft may be manually rotated whenever this may be desirable as in setting up the machine or leading in the abrasive band. The cover casting d8 is provided also with upper and lower bearings for an upper roll shaft 54 and a lower roll shaft 52 respectively. The upper roll shaft 5d is provided with a pinion 5E meshing with the pinion 52 on the ratchet shaft 40. The shaft 5&3 extends rearwardly into a bushed bearing in the carrier member 3d and forwardly into a recess in the face of the casting 48 where it is provided with a rubber roll 58 secured in place by a clamping nut Eil. The roll 58 has the functions of a friction member in holding the abrasive band in place and also of a feeding member, as will presently appear.

The lower roll shaft 62 is of smaller diameter and is arranged to slide longitudinally in the elongated hub iid of a pinion 65 which meshes with the pinion 52 of the ratchet shaft. The hub Sli of the pinion is journalled in a bushed bearing in the lower portion of the carrier member 34 and is provided with a transverse slot in its outer end in which slides a cross-pin 66 which is set in the shaft 62. This shaft, therefore, is driven by the pinion 52 but is movable axially or longitudinally with respect thereto. The forward end of the shaft 62 is enlarged and between this portion thereof and the face of the pinion G5 is interposed a compression spring 5&3 which tends at all times to urge the shaft forwardly. At its forward end the shaft t2 is arranged to slide in vthe bore of the lower rubber roll lll. The latter is lprovided with an elongated hub and this is journalled in the lower bearing of the casting 138. The roll 'lil has a cross-pin 69 extending across its bore and the forward end of the Yshaft 52 is slotted freely to receive the same. By this means, therefore, a positive driving connection is maintained between the shaft 62 and the lower rubber roll l2. The rear end of the shaft 52 projects beyond the end of the. hub 64 vand is provided with a knurled portion' by which it may be conveniently grasped andv retracted when it is desired to release the lower rubber roll l0 for the purpose of removing the4 latter for replacement or renewal. It will be seenthat both rubber rolls are turned equally and in-the same direction by their geared Aconnection with the ratchet `shaft 40 wheneverythe latter is rotated. A cover'plate 49V issecuredfby screws 5| tothe front face of ,the casting 48 and serves to inclose the `upper rubber rol158 abrading 4or roughing operation is performed.v

A relatively large supply of the abrasive `band l2 is maintained in the form of a `coil in areel 14 supported by a bracket '|6"securedltoand projecting upwardly from the'head lcasting |2. The reel '14 may be of any suitable construction and forms no part of the present invention. It is, however, provided with an" adjustable tension device 18; by which its rotation is retarded so that it will not overrun the band 12 as the latter is drawn therefrom.

The band 'l2 passes downwardly fromthe reel Hand is threaded between the `upper 'rubber roll 58 and a smaller rubber guide roll 80 which is maintained in yielding engagement with the outer side of the larger roll. Thence theabrasive band passes vertically downwardly, about the lower rubber roll l0, thence upwardly past the other side of the upper rubber roll 58 and .finally toV a serrated blade l1 which is carried i roll 58 is provided withaA second rubber guide roll 84 similar to the roll 80 already mentioned and located oppositely thereto. The guide roll 80 is mounted near the upper end of a vertically disposed arm 8| and the guide roll 84 in a similarly arranged arm 85. The arm 8| journalled to swing -upon a pin 82 and is provided at its lower end with a ngerpiecel The arm 85 is pivoted to swing upon apin 86 and provided at its lower end with a ngerpiece 8l in alignment with and oppositely directed from the finger piece 83. l The upper ends of the arms 8| and 85 are hook-shaped and connected by the tension spring 88 which acts normally to swing the arms inwardly andlmaintain the abrasive .strip l2 yieldingly engaged between the respective guide rolls and the opposite sides of the vupper roll 58. When for any reason itis desired. to swing the'guide rolls outwardly,` as

in threading the abrasive band into the machine, the finger pieces 83 and 8l may conveniently be pressed together and the arms swung outwardly in opposition to the-spring 88. The action of the rolls 80 and 84 is to maintain the abrasive. band evenly and yieldingly drawn with a suitable degree of tension about the periphery of the lower rubber roll 'I0 so that the band will be maintained smoothly and securely in position during .the rapid vibration of the abrading tool. The rolls cooperate not only to shape a portion of the abrasive band into loop form, but to maintain it in this condition so that it is effective in a more or less flattened arc eiiiciently to perform an abrading or roughing operation upon the work presented to it.

An auxiliary bracket casting |00 is bolted to the right hand side of the column I0, as best shown in Fig. l. This is provided with a forwardly extending arm |0| in the outer end of which is mounted a work support, to be presently described. The bracket also carries a portion of the band-feeding mechanism, that is to say, the

element. bywhch they latter -is thrown into operation. f

,"It'will` be apparent that, in as much as the effective area ofthe abrasive strip is limited,`

the operative portiony thereof must be renewed frequently. To take care o-f this requirement, manually operated means are provided for causing the power actuation of the ratchet shaft 40 whenever desired. A hand lever 90 is pivotally connected to the bracket |00 within convenient reach of the operator and is yieldingly connected through a slotted link 9| to the forward end of a carrier arm 92 journalled to swing vertically upony a stud 93 projectingfrom the upper part of ther bracket. The arm 92 extends above and in vertical alignment with the ratchet disk 42 and is provided with a pawl 94 which may be brought into'engagement with one of the ratchetteeth byj swingingthe arm 92 downwardly in a counter clock-wise direction. The hand lever 90 is normally' elevated by a y.tension spring'95 and accordingly holds therlever .92 in an elevated position wherein the pawl 94 is disengaged from the teeth of the ratchet disk 42. However, when the operator depresses the lever 90, the pawl 94 engages `a tooth of the ratchet disk as the latter is bodily moved back and forth with the carrier member 34 and the effect thereof is to advance the ratchet disk vone step at a time,v correspondingly turning the rubber rolls 58 and 'lil `and advancing the abrasive strip so as` to bring a fresh portion thereof into operative position upon the lower roll T0. When such feeding movement of the bandhas occurred, the operator releases the lever 90 and the pawl 94 is immediately disengaged from the ratchet disk 42, leavinga fresh portion of the abrasive band Yclamped in operative position.

`The machine as shown 1n Figs. 1 and "3 is 'which it is securely bolted by a clamping bolt |03 to the front end of an angular bracket |04. The bracket is pinned to the upper end of a stem |06 and the latter is mounted to slide in a Vertical bore formed in the forward end` of the arm |0| of the bracket |00. A tension spring |08 normally elevates the bracket |04 and the gauge table, the upward limit of its movement being determined by an adjustable collar ||0 secured to the lower end of the stem |06. The bracket |04 and the work tablemay be lowered by the operator in presenting the work to the machine by a tread rod 2 which is pivotally secured to the lower end of the stem |06. The bracket |04 is provided in its upper face with a guideway in which is mounted a slotted edge gauge slide ||4. The slide carries an ,edge gauge roll H8 which is disposed adjacent tothe rear edge of the work table |02 and arranged to rotate about a vertical axis in contact with the edge of the work. A clamping bolt |I6 is provided bywhich the edge gauge slide ||4 may be `clamped in any desired position of adjustment. Theedge gauge 8 is located directly behind the roll 10 when the latter occupiesits central position. The path of the reciprocatory abrading tool is, therefore, disposed directly in front of the operative point of the gauge.

When it is desired to utilize the machine for roughing the bottom of a lasted shoe, preparatory to receiving cement in attaching an outsole thereto, the bracket |04 together with the rcn loY

Work table |02 vand its associated parts are removed frorn the machine and a gauge of the character shown in Fig. '7 is substituted therefor. When thus equipped, the machine is provided With a gauge arm |20 which is clamped in any convenient manner to the reel bracket 'I6 and which extends downwardly in front of the abrading tool. The arm 20 isr provided with a vertically disposed groove which is closed by a cap plate i26 and forms a guideway for a gauge slide 122. The latter is inclined inwardly at its lower end and is provided with a gauge wheel E24 adapted to run on thesurface of the insole of an inverted shoe when the latter is presented to the roughing tool. A tension spring E28, extending between a pin in the cap plate `|26 and a pin in the gauge slide, holds the gauge normally in its lowermost position but permits it to yield upwardly when engaged by the shoe. As shown in Fig. 7, the last I 36 carries an insole E34 on its tread face and the upper material 33 has been over-wiped and secured to the face of the insole by staples, tacks, or other fastening means. The gauge wheel 24 is positioned vertically by its engagement with the surface of the insole i3d and it acts to position the lasted shoe width-wise with respect to the abrasive tool by engaging the edge of the inturned upper material, or the crease between this material and the insole. As the shoe is advanced by the operator, its path is determined by the gauge Wheel l2@ and the over-wiped l margin of the upper material is subjected to the rubbing action of the abrasive band carried by the roughing tool. The roughing operation proceeds in'this manner about the periphery of the shoe removing the finished surface from the leather and permitting the later applied cement to form a rm bond with the upper material.

In operating upon an outsole E30, when the machine is equipped as shown in Figs. 1 and 3, the latter isl gauged from its outer edge Vby the edge gauge roll Ht and a roughened peripheral Zone 132 is formed by the action of the roughing tool as the sole is carried through the machine. lIn completing the shoe, therefore, a firm bond` of cement is insured both between the inturned upper material on the shoe bottom and the surface of the outsole covering the same. v

Having thus described my invention what I claim as "new and desire to secure by Letters Patent of the United States is:-

l. A machinefor roughing shoe parts, comprising a vibratory carrier' having an outer back-` ing roll for an abrasive band, and an inner feed roll, an abrasive band disposed about the backing roll .and in feeding engagement with the feed roll at both sides of the backing roll, means for holding the band against the circumference of the feed roll at diametrically opposite points, and mechanism for rotating said roll to advance the band across the backing roll.

2. A `roughing tool comprising a carrier member having a backingroll at its outer end, and means for guiding an abrasive band in a loop about said roll, including a centrally disposed friction member, and releasable presser members arranged to press the band against the opposite sides of said friction member.

3. In a machine for roughing shoe parts, the construction with a vibratory carrier, of a pair of gear-connected rolls therein, an abrasive band passing about said rolls and yieldingly supported in operative position by one of them, and mechanism outside said carrier for controlling, at the will of the operator and without affecting the vibratory movement of the carrier, the rotation of said rolls and thereby the advancing movement of the band.

4. In a machine for roughing lshoe parts, a vibratory carrier, a roll therein constructed and arranged to support and feed an abrasive band, a gear train in the carrier for rotating said roll, and means for detachably connecting said roll and trainpermitting convenient replacement of the roll.

5. In a machine for roughing shoe parts, a vibratory carrier having spaced band positioning and feeding rolls, driving mechanism for the rolls including a gear train and a ratchet disk mounted upon the carrier, and a manually controlled pawl mounted independently of the carrier arranged to be moved by the operator, while the carrier is vibrating, into or out of position to engage and rotate the ratchet disk during themovement of the carrier in one direction.

6. A machine for roughing shoe bottoms, comprising a vertically yielding roller gauge adapted to run upony the insole of an yinverted shoe in contact with the inner edge of the inturned upper material, and a vibratory carrier mounted adjacent to the gauge and having a yielding abrasive-covered face arranged to operate upon the inturned margin of the upper outside of the gauged edge thereof.

CHARLES G. BROSTROM. 

